https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123045
--- Comment #8 from Kirill A. Korinsky <kirill at korins dot ky> --- libestdc++ is name for libstdc++ inside ports, because some supported architectures in OpenBSD uses very old gcc in base. So, inside ports all libstdc++ is renamed to libestdc++ to avoid conflict with system libstdc++ when it available.
